... 2-) High Quality Metal Body 3-) One Year Warranty 4-) CE/ISO Certificated AC,BC F.R.L air treatment ... * Small size, F+R+L three units, port size 1/4", manul drain type, model no. is AC2000 * Middle size, ... * Small size, F.R.+L two units, port size 1/4", auto drain type, model no. is AFC2000D * Middle size, ... no. is BL4000 AC/BC Series Filter/Regulator&Lubricator/FR.L Combination/Air Source Treatment Unit